BRAIN TEASERS

Monthly Archive - May 2025 (page 4)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 31 to 40.

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MAGIC SQUARE: Calculate A-B+C

The aim is to place the some numbers from the list (17, 18, 19, 20, 23, 25, 29, 30, 35, 89, 91) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A-B+C.

Correct answers: 1

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Doughnut cutter

In 1872, New England sea captain, John F. Blondel of Thomaston, Maine, patented the doughnut cutter, (but can't take credit for the hole). The origin of the doughnut as a deep-fried egg-batter pastry was from Holland with the Dutch name of olykoeks -- "oily cakes." In 1847, another New England ship captain's enjoyed his mother's pastries. Made using a deep-fried spiced dough, Elizabeth Gregory put hazelnuts or walnuts in the center, where the dough might not cook through - "doughnuts." Captain Hanson Gregory claimed credit for originating the hole in the doughnut. Originally, he cut the hole using the top of a round tin pepper box. This made more uniform frying possible with increased surface area, commemorated by a bronze plaque at his hometown, Rockport, Maine.

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